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- W2020610069 abstract "The heavy-fermion metal ${mathrm{YbRh}}_{2}{mathrm{Si}}_{2}$ is studied by low-temperature magnetization $M(T)$ and specific-heat $C(T)$ measurements at magnetic fields close to the quantum critical point (${H}_{c}=0.06text{ }text{ }mathrm{T}$, $Hensuremath{perp}c$). Upon approaching the instability, $dM/dT$ is more singular than $C(T)$, leading to a divergence of the magnetic Gruneisen ratio ${ensuremath{Gamma}}_{mathrm{mag}}=ensuremath{-}(dM/dT)/C$. Within the Fermi-liquid regime, ${ensuremath{Gamma}}_{mathrm{mag}}=ensuremath{-}{G}_{r}(Hensuremath{-}{H}_{c}^{mathrm{fit}})$ with ${G}_{r}=ensuremath{-}0.30ifmmodepmelsetextpmfi{}0.01$ and ${H}_{c}^{mathrm{fit}}=(0.065ifmmodepmelsetextpmfi{}0.005)text{ }text{ }mathrm{T}$ which is consistent with scaling behavior of the specific-heat coefficient in ${mathrm{YbRh}}_{2}({mathrm{Si}}_{0.95}{mathrm{Ge}}_{0.05}{)}_{2}$. The field dependence of $dM/dT$ indicates an inflection point of the entropy as a function of magnetic field upon passing the line ${T}^{ensuremath{star}}(H)$ previously observed in Hall and thermodynamic measurements." @default.
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- W2020610069 title "Divergence of the Magnetic Grüneisen Ratio at the Field-Induced Quantum Critical Point in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mi>YbRh</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Si</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>" @default.
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- W2020610069 doi "https://doi.org/10.1103/physrevlett.102.066401" @default.
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